diff --git a/hosts/radiobert/default.nix b/hosts/radiobert/default.nix
index e39bbaf6..d72665e5 100644
--- a/hosts/radiobert/default.nix
+++ b/hosts/radiobert/default.nix
@@ -132,7 +132,8 @@ in
 
   # TODO: `services.collectd.plugins.exec` is already defined by pi-sensors
   # (https://github.com/NixOS/nixpkgs/pull/141551)
-  services.collectd.extraConfig =
+  # services.collectd.extraConfig =
+  services.collectd.plugins.exec =
     let
       distanceRb = pkgs.fetchurl {
         url = "https://github.com/djberg96/gis-distance/raw/main/lib/gis/distance.rb";
@@ -143,9 +144,7 @@ in
         cp ${distanceRb} $out/distance.rb
       '';
     in ''
-      <Plugin exec>
-        Exec "${config.services.collectd.user}" "${pkgs.ruby}/bin/ruby" "-I${libDir}" "${./collectd-adsb.rb}"
-      </Plugin>
+      Exec "${config.services.collectd.user}" "${pkgs.ruby}/bin/ruby" "-I${libDir}" "${./collectd-adsb.rb}"
     '';
 
   environment.systemPackages = with pkgs; [